Hi,

A few years ago i bought a David Andersen Drabant 2,5 on Ebay. I wanted it since I had one when I was 15 years old, which is 48 years ago.
The engine is of the first kind of DA with twin BB Construction, which was delivered with an aluminium spinner. It might have been produced in the late 50's.

C/L flying is seeing an increased interest in my region, although mostly between People my age.
I want to build and fly a C/L plane with it, most probably it will be a kind of semi stunt plane without flaps.

I have now tested it, this is the result:
Prop: 8x6 of the yellow, rather soft type. I think it is a Tornado.
Max. rpm: 10,290

I got the fuel via a model airplane friend, and don't know the origin. However I think it is British, and most probably has IPN in it.
I could relieve the comp screw a little when it got hot, much like it was with Amyl nitrate back then.

When Cold the compression is very good and tight, Seconds after a full power run it will leak out. I can however restart it without problems when it is hot.

Does this sound like an engine suitable for flying?

Thanks for you Help,
Helge.